Skimmer



Oct. 13, 1931.

R. J. ANDERSON SKIMMER Filed Aug. 15, 1930 2 sheets-sheet 1 Oct. 13,1931. R. J. ANDRsoN SKIMMER Filed Aug. 15, 1930 2 Sheets-Sheet 2Patented oa. 12., 1931 UNITED STATES PATENT OFFICE RUSSELL '.T.ANDERSON, OF RACINE, WISCONSIN,`ASSIGNOR TO BELLE CITY MALLEABLE IRONCOMPANY, OF RACINE, WISCONSIN, A'CORPORA'IION OF WISCONSIN sxmmnnApplication 'med August 15, 1930. Serial No. 475,482.

My invention relates to skimmers and especially to improvements for thattype o f skimmer used in removing slag and impurities from the surfaceof a bath of molte #il metal.

' high temperatures,

As these skimmers are subjected' in use to they burn out and lose theirusefulness, necessitating frequent replacement and adding to themanufacturing burden to that extent.

burning out of the skimmers by protecting them in such manner.

The present invention relates to other forms of liquid cooled skimmers,the objects of the invention being to provide improved forms of skimmerswhich will be cheap to produce and in practice will satisfactorilyperform their intended function without burning out or otherwise gettinginto disre air. p Such objects may be achieved by the practicableembodiments of the invention herein chosen by way of example forpurposes of illustration in the accompanying sheets of drawings,wherein:

Figure 1 is a top plan view of a skimmer;

Figure 2 is a side elevational view of the same skimmer;

Figure 3 is an end elevational view of the skimmer;

Figure 4 is a top plan view of a similar but modified type of skimmer;

Figure 5 is a side elevational view of the modified form of a skimmer;and,

Figure 6 is an end elevational view of said modified skimmer.

In the first form of the invention illustrated in Figures 1, 2 and3, theskimmer embodies a hollow, rectangular box-shaped skimmer head 10 whichhas connected to one face substantially intermediately of its ends, apair of pipes l1 forming the shaft of the skimmer. Said pipes are incommunication with the interior ofthe head and are preferably arrangedin parallelism, with one pipe located on each side of the longitudinalcenshown at ter line of the shaft as appears in Figure 1. Said pipes 11where they meet the head are preferably curved to diverge outwardly, as12. The free ends of the pipe are joined by any appropriate connector 13to receive a handle 14. Each pipe has associated therewith a lead nipple15 and one of aid nipples lis provided with a control valve Obviously,in use the valve 16 will be opened to permit circulation of a coolingliquid, such as water, along one of the pipes 11, said liquid because ofthe curve 12 moving outwardly to the adjacent end of the head and thenceflushing and washing the interior thereof as indicated by the arrows inFigure 1. 'I` hence the water or other liquid is returned through theother pipe 11 in an obvious manner to complete the circulation bypassing 0E through the outlet nipple 15. In this manner the coolingliquid functions as a heat transfer medium to maintain the skimmerrelatively cooled whereby said skimmer is protected against burning out,as will be readily understood by those skilled in this art.

In the modified form appearing in Figures 4, 5 and 6 the shaft againcomprises two parallel, spaced lengths of pipe 17 the free ends of whichare appropriately'joined by Ya connector 18 which carries the handle 19.The opposite, or other ends of these pipe lengths are again outwardlycurved as at 20. Said curved pipe ends then turn laterally outwardly inopposite directions as shown at 21, thence downwardly at their ends asat`22 and inwardly again at the bottom' to form a Tun of pipe 23parallel and below the wings 21 to form the skimmer head. Thus, it canbe seen a continuous length of pipe is formed into a unitary shaft andhead structure. Each pipe length 17 carires a lead 24 one of which isprovided with a control valve 25 so that a cooling fluid, such as water,may be circulated along one run 17 of the pipe, thence through theskimmer head portion of the continuous pipe, thence back along the otherrun 17 of the pipe and nally out through the outlet nipple 24 in anobvious manner. Here then isa simplified form of a skimmer toolcomprising a single length of pipe formed into a unitary shaftI and headstructure to permit free circulation of a cooling liquid to maintain thetool cooled whereby oxidization and burning out thereof in use Within a.metal melting furnace will be eectually prevented.

From the above detailed disclosures the construction and use of theimproved skimmers are clear, and it must also now be a parent that theseskimmers achieve the desirable objects for the invention heretoforerecited.

It is the intention to cover herein all such changes and modificationsof the selected eX- amples herein shown as do notI depart from thespirit and scope of myinvention which is expressed in the' subjoinedclaims.

lVhat l claim is: 4 f

l. ln a. skimmer, a hollow skimmer head part, a shaft connected thereto,said shaft comprising` two separated lengths of pipe lying laterallyside by side with respect to each other and each communicating at oneend withthe hollow head, means joining said two pipe lengths at theother end, a handle portion connected to said joining means, and meansfor causing a cooling liquid to be circulated along one pipe length,thence through the head part, and back through the other pipe length.

2. In a skimmer, a skimmer head part, a shaft connected thereto saidshaft comprising a pair of spaced, substantially parallel pipes arrangedsubstantially side by side and connected to the head, and means wherebya cooling liquid may be circulated throu h one pipe, thence through thehead part an back through the other pipe.

3. In a skimmer, a skimmer head part,'a shaft connected thereto, saidshaft comprising a pair of pipes, spaced apart side by side and eachconnected with a. curved portion to the head part, and means whereby acooling liquid may be circulated along one pipe, thence through the headpart, and back through the other pipe.

4. A skimmer comprising a hollow skimmer head part a pair of pipelengths arranged side by side to form a shaft, said pipe amasar a shaftpart formed of two lengths ofthe pipe arranged side b side, each lengththen bent outwardly to form Wings, each wing then bent downwardly andjoined below the Wings to form a skimmer head part.

RUSSELL J. ANDERSON.

length communicating with the interior of the head part whereby acooling liquid may be circulated through the shaft and head part.

5. A skimmer comprising a hollow elongated skimmer head part, a shaftcomprising a pair of pipe lengths arranged side by side and spaced aparton opposite sides of the shaft center line, said pipe lengths eachmerging in an outwardly flared curve with the head part to communicatewith the interior thereof, whereby a cooling liquid may be circulatedthrough the shaft and head.

6. A skimmer formed of a unitary length of pipe into a shaft part and ahead part.

7. A skimmer comprising a pipe having

